2. A Sexual Act in which a male ejaculates over a partner's face or chest. A variant of this act involves turning around after ejaculation and passing gas in close proximity to the ejaculated area or the partner's nose.

She's such an unpleasant person; I hope she gets a Jackson Pollock tonight!

The Urban Dictionary T-Shirt

this is derived from an artistic style which was used by pollock. While your significant other is sleeping you jizz sporadically all over their face and upper extremities. thus creating a form of art similar to that of jackson pollock